jasonfodor
(1) Is 1.2 considered even or neither?
(2) Is -2 considered even or neither?
Different sources define even/odd different ways. Haven't seen an GMAT official question were ambiguity could be called into question. Think it may be a bit controversial to show up on the GMAT without a lead in question. For example a GMAT question might ask if 1.2 is an even integer and you can safely answer No, because it's not a integer.
It's pretty established zero is neither positive or negative and zero is considered even. For GMAT purposes, are decimals considered even/odd or neither? Are negative numbers considered even/odd or neither?
From what I've seen decimals are neither even or odd. And the questions I've seen lean towards negatives being considered even or odd versus being considered neither.
GMAT does not have its own math. There is not ambiguity there.
An even number is an
integer that is "evenly divisible" by 2, i.e., divisible by 2 without a remainder. So, ..., -4, -2, 0, 2, 4, ... are all even integers.
An odd number is an
integer that is not evenly divisible by 2. So, ..., -3, -1, 1, 3, 5, ... are all odd integers.